反应详情

Following the procedure described in part E of Example 1 (R), (S)-α-[[2-[((1,1-dimethylethyl)dimethylsilyl)oxy]-2-[4-hydroxy-3-[(methylsulfonyl)amino]phenyl]ethyl]amino]-4-methoxybenzeneacetic acid was condensed with diethyl 3-aminobenzylphosphonate to generate the title compound. The diethyl 3-aminobenzylphosphonate was prepared by sequential treatment of commercial 3-nitrobenzyl bromide with triethyl phosphite at 125° C. for 6 hours followed by reduction with Na2S2 O4 in THF/H2O at 100° C.